The connection of in the nadare joseki is advised to players who prefer to avoid the complexities of the large and small nadare joseki.
It is, however, also an excellent joseki in its own right. Players of any level of knowledge can play this move whenever they feel that taking territory in the corner in exchange for giving White influence in the center is not disadvantageous.
is more or less the only move, and
is the most usual continuation. After that, White will usually fix up her shape with a. Other plays for White are: lengthen the wall with b, play tenuki, or play at c to try to force Black.
The only important variation in this joseki (as far as I know) is here. In this diagram, Black takes even more territory and gives White even more thickness.
If Black omits , White might play there, and Black is more or less obliged to play a, which is painful.
can also be played at b.
-- AndreEngels